Tabulation mechanism of typewriting machines



s Wmmv Y O. FISCHER '3 TABULATION MECHANISM OF TYPEWRITING MACHINESOriginal Filed Jan. 25. 1924 2 Sheets-Sheet 1 fnvenioz" Gila/u 853M 2)6/ 7 i 7 y i'fozne s May 25 1926. 1,585,658

0. FISCHER TABULATION MECHANISM OF TYPEWRITI'NG MACHINES Original FiledJan. 25. 1924 2 Shoots-Sheet 2 lrwenior patented May 2;, 192a.

UNITED STATES PATENr osm rrscnnn, or nnnmn-rarnnnnnu, GERMANY, assrenonTO N. v. nacnma manrsonnrrn von HANDEL 1m nvnusram, or AMSTERDAM,nnrnnnnanns; a

CORPORATION OF THE NETHERLANDS.

TABULATION MECHANISM OF TYPEWRITING MACHINES.

Original application filed January 25, 1924, Serial No. 688,899. Dividedand this application filed April- 10, -1825, Serial No. 22,061, and inGermany November 4, 19181.

My invention relates to improvements in the tabulation mechanism oftypewriting machines, and the object of the improvemnts is to provide atabulation mechanism which is simple in construction and handy inoperation. With this object in View my invention consists in disposingthe tabulation stops on a bar provided at the front side of thecarriage. Therefore the said stops are readily accessible, and, further,I am enabled to provide very short tabulation key levers,

- which key levers extend from the rear part of the keyboard and throughthe front part of the frame. into position for engagement withvertically shiftable rods adapted to be lifted by the key levers intoposition for engagement with the said tabulation stops.

For the purpose of explaining the inven tion an example embodying thesame has been shown in the accompanying drawings in which the samereference characters have been used in all the views to indicatecorresponding parts. In said drawings,

Fig. 1, is a sectional elevation showing the upper part of a typewritingmachine. Fig. 2, is a top plan view of-Fig'l with the upper part of thepaper carriage re-' moved, and v Fig. 3, is a sectional elevation onalbroken plane of section.

In describing the invention itwill be assumed that in improvedtabulation mechanism is embo ied in a typewriting machine of the typeshown and described in my orig inal a plication for Patent Ser. No.688,399, filed fanuary 25th, 1924, now Patent 1,553,- 7 65, dated Sept15, 1925, of which the present application is a division. But I WlSh itto be understood that my invention is not limited to'the :use of thetabulation mechanism in a machine of the type referred to in the saidoriginal application. In the present application I shall-make reference{to the tabulation mechanism and such parts 5 of the machine as arenecessary for getting a clear understanding of the said .mechanism. Forfurther information reference is made to the said original a plic'ation.

In the example shown in t e figures my improved typewriting machinecomprises a frame 1 having a top plate 2. To the said top plate rails 3and 4: are secured which provide a guide for a paper carriage 5, whichcarriage is provided with letter spacing mechanism constructed asfollowszOn the top plate 2 of the frame of the machine and at the rearthereof a bail consisting of a rail 8 of square cross-section and arms 7is rockmgly mounted in eyes 8 and 9 secured to the bottom side of theplate 2. Onthe rail 6 mounted in eyes 20 and 21 secured to the plate 2,and arms 22, 23 and 24. The lower rack 17 is carried by the upper rack18 and it is longitudinally slidable thereon a distance corresponding tothe letter space. As

showna-pair of screws 25, are passing through the slots 26 formed in theupper rack. A spring (not shown) tends to pull the lower rack to theright. l he heads of the screws 25 are acted upon by springs 27 reducingthe noise connected with the op eration of the racks. The arm 23 isconnected by a link 28 with a frame 29 rockingly mounted on trunnions30. The frame 29 is adapted to be rocked by tie armature of anclectromagnet 31 for letter spacing after printing a letter, as has beendescribed in mv aforesaid original application for patent. en thearmature is attracted by the electromagnet 31 the frame 29 and the link28 are carried along, so that the pawl 11 temporarily releases the lowerrack 17 and engages the upper rack. Thereupon the lower rack is pulledby its spring to the right. If thereafter the armature of theelectromagnet 31 is released the racks 17 and 18 are lifted by a spring50 (Fig. 1) so that the pawl 11 comes again into engagement with thelower rack which is shifted by the The tabulation keys 32 are carried bylevers 33 disposed with their inner or rear ends in positionsforengagement with vertical bars 3 1. Said bars are acted upon by leafepringe 8t tending to force the'same downwardly and away from tabulationstops 36 placed on a rack 37 ot' the paper carriage. The bars 3 1- areadapted to rock a frame 38 mounted at '39, 40 and acting on a lever 41mounted at 412. The free end 43, of the said lever is disposed above ahead 4A adjustably mounted on an arm 45 secured to one of the arms ofthe rail 6. When depressing one of the tabulation keys the bar 34controlled thereby is lifted into position for engagement with thetabulation stop 36 for arresting the paper carriage, and therail 6 andthe pawl 11 are retracted away from the racks 17, 18 so as to releasethe carriage, which is now pulled to'the ri ht. For reducing the impactof the carriage stinking against the tabulation sto 36 a brake shoe 4a:is provided which is torced by an arm 4-"? secured to the frame 38against the bottom side of the rail 16 of the carriage.

While in desdribing the invention reference has been made to aparticularexample embodying the same I wish it to be under- Q5 stood that myinventionvis not limited to the construction shown in the drawings, and

that various changes may be made in the general arrangement of theapparatus and the construction of its parts without departing from theinvention. p

ll claim; l. lln a type-writing machine the com bination of a frame, apaper carriage, a rackand-pawl escapement device including a rackmounted on the frame a rail swingingly mounted on the frame a pawlslidable on the rail and engaged by the carriage, said bar in its rangeof swing carrying the pawl to and from a position of engagement with therack, tabulation mechanism including a stop borne by the carriage and abar borne by the frame and movable to and from stop-engaging position,and means for shifting said bar and swinging said rail simultaneously.

2. In a type-writing machine the combination of a frame, a papercarriage, a rail swingingly mounted on said frame, a rack-and-pawlescapement device arranged between frame and carriage, one of thecomponents of said rack-and-pawl eseapement device being movable withthe carriage and slidably mounted on said rail and movable bytheswinging of the rail to inactive position, tabulation mechanismincluding a stop borne by the carriage and a bar borne by the frame andmovable to and from stop-engaging position said bar in its advance tostop-engaging position swinging said rail to the position of inaction ofthe escapemen't device. 1

In testimony whereof I hereunto affix my signature.

OSKAR 'FISCHElEt.v

